When just the bearing is used, they will fit up to a 1/4" diameter pivot. If combined with the races, the bearing/race combo will easily fit a 3/16" pivot.

NOTE: When milling a pocket for these in the handle or blade or both, the main concern is the outer diameter. The ID does not have to snug up against the pivot. The pocket will hold the bearing in place perfectly.

The race washers are hardened and have a groove that will perfectly fit the roller balls. If you are using a loose bearing set up and having to break in the ball groove, using these races will eliminate that step. You don't have to use the races to work with these bearings.